Senior Frontend Software Engineer

Ready to build software that tackles climate change head-on? We're Payaca, and we're on a mission to accelerate the world’s net zero emissions transition. We're looking for a Senior Frontend Software Engineer to join our small but mighty team in Bristol.

In the UK transport, electricity, and heating account for 60% of greenhouse gas emissions . To limit global temperature increases to 2°C, we and the rest of the planet must decarbonise these sectors by 2050. We know exactly how: switch to low carbon technologies like EVs, solar PV, and heat pumps. The problem we now face is how can we do so fast enough?

That's where Payaca comes in. We empower installers of all these low carbon technologies. Helping them work faster, scale their businesses and, in turn, scale the UK's green energy future.

You'll be working across the codebase, with a focus on frontend apps. In this role you will:

• Take user requirements and build solutions across our web and mobile apps.
• Establish user requirements through a deep understanding of the customer's needs.
• Tackle technical debt to improve the quality of the codebase
• Mentoring your peers, helping them improve

We don't have dedicated Product Managers, so you'll have the freedom and responsibility difusión to make key decisions yourself, in collaboration with the rest of the team. This is a chance to have a direct impact on our product and our mission.

Our stack is built on modern, familiar technologies:

• Frontend: React, React Native / Expo, Type Script, Tailwind, Figma
• Infrastructure: Google Cloud Run, Firebase Hosting, Terraform, CircleCI
• DX: Monorepo, pnpm, Macbook

Our engineers’ work calendar are close to empty, with most days fully available for focus time after morning standup.

We are T-shaped engineers — we each have a speciality, but still get stuck into areas outside of them. We encourage full-stack development with expert review, avoiding ticket pass-the-parcel.

We are massive champions and adopters of agentic AI across the company. To name a few examples:

• Our engineers delegate much of their workload to coding agents, enabling us not just to ship more features but also to tackle ambitious refactors.
• Our customer support staff use agents with codebase access to triage even the most obscure customer questions without interrupting engineers.
• Our customer onboarding staff use agents connected to our application APIs to turn lengthy manual tasks into a chat conversation.
• When we get a platform error notification in Slack, we'll @ Claude to give it a first triage and fix attempt before distracting an engineer.
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Staff outside of engineering are able to contribute PRs (of decent quality!) reviewed by engineers but authored and amended entirely by agentic AI, thanks to well documented engineering tastes.

We are at the bleeding edge of AI tooling adoption because we are seeing huge productivity boosts in it. The way software businesses operate is changing as fast as the tooling and models evolve. Some might say it's scary, but for us it's exciting to witness what a small team can achieve today.

• 4+ years of experience with React and Type Script
• 3+ months experience in leveraging AI agents

We value diverse perspectives and encourage you to apply even if you don't tick every box.

Work isn't a grind here; it's a mission. We've built a culture that supports you while you do your best work.

• Location: We're based in the heart of Bristol, UK, and we believe in the power of in-person collaboration. We expect our engineers to work primarily in the office.
• Benefits: You'll get 33 days holiday (including bank holidays), free breakfast and snacks, a chest freezer full of ice cream for the summer, team lunches, and away trips. We also offer a cycle‑to‑work scheme and flexibility whengart you need it.

If these principles resonate with you, you'll feel right at home:

• Simple solutions beat clever ones every time.
• We ship small improvements frequently.
• Arguments win on merit, not seniority.
• If you're not breaking stuff, you're not moving fast enough — we focus on minimising impact over prevention.
• AI…